from flask import render_template,session,current_app,g,abort,request,jsonify
from . import news_blu
from info import constants,db
from info.models import User,News,Comment,CommentLike
from info.utils.common import login_required
from info.utils.response_code import RET


@news_blu.route("/<int:news_id>")
@login_required
def news_detail(news_id):
    try:
        news_id = int(news_id)
    except Exception as e:
            current_app.logger.error(e)
            abort(403)

    news = None

    try:
            news = News.query.get(news_id)
    except Exception as e:
            current_app.logger.error(e)
            abort(500)


    if not news:
          # 返回数据未找到的页面
            abort(500)

    news.clicks += 1


    user = g.user

      # 首页排行列表，需要按照点击量倒序。并且显示6条
    clicks_news = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS).all()
    clicks_news_dict_list = [news.to_dict() for news in clicks_news]
    is_collected = False
    if user and news:
        if news in user.collection_news:
            is_collected = True

    comments = Comment.query.filter(Comment.news_id == news_id).order_by(Comment.create_time.desc()).all()
    comment_ids = [comment.id for comment in comments]
    comment_likes = CommentLike.query.filter(CommentLike.user_id == user.id,CommentLike.comment_id.in_(comment_ids)).all()
    comment_like_comment_ids = [comment_like.comment_id for comment_like in comment_likes]

    comment_dict_list = []
    for comment in comments:
        comment_dict = comment.to_dict()
        comment_dict["is_like"] = False
        if user and comment.id in comment_like_comment_ids:
            comment_dict["is_like"] = True
        comment_dict_list.append(comment_dict)
    data = {
                "news": news.to_dict(),
                "user_info": user.to_dict() if user else None,
                "clicks_news": clicks_news_dict_list,
                "is_collected": is_collected,
                "comments":comment_dict_list
    }


    return render_template("news/detail.html",data = data)

@news_blu.route("/news_collect", methods=['POST'])
@login_required
def news_collect():
    """新闻收藏"""
    user = g.user
    json_data = request.json
    news_id = json_data.get("news_id")
    action = json_data.get("action")

    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")

    if not news_id:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    if action not in ("collect", "cancel_collect"):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="查询数据失败")

    if not news:
        return jsonify(errno=RET.NODATA, errmsg="新闻数据不存在")

    if action == "collect":
        user.collection_news.append(news)
    else:
        user.collection_news.remove(news)

    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg="保存失败")
    return jsonify(errno=RET.OK, errmsg="操作成功")







@news_blu.route('/news_comment', methods=["POST"])
@login_required
def add_news_comment():
    """添加评论"""

    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")
    # 获取参数
    data_dict = request.json
    news_id = data_dict.get("news_id")
    comment_str = data_dict.get("comment")
    parent_id = data_dict.get("parent_id")

    if not all([news_id, comment_str]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数不足")

    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="查询数据失败")

    if not news:
        return jsonify(errno=RET.NODATA, errmsg="该新闻不存在")

    # 初始化模型，保存数据
    comment = Comment()
    comment.user_id = user.id
    comment.news_id = news_id
    comment.content = comment_str
    if parent_id:
        comment.parent_id = parent_id

    # 保存到数据库
    try:
        db.session.add(comment)
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="保存评论数据失败")

    # 返回响应
    return jsonify(errno=RET.OK, errmsg="评论成功", data=comment.to_dict())

@news_blu.route("/comment_like",methods = ["POST"])
@login_required
def comment_like():
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR,errmsg="用户未登录")
    data_dict =request.json
    comment_id = data_dict.get("comment_id")
    action = data_dict.get("action")

    if not all([comment_id,action]):
        return jsonify(errno=RET.PARAMERR,errmsg="参数错误")
    try:
        comment_id = int(comment_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR,errmsg="参数错误")
    if action not in ["add","remove"]:
        return jsonify(errno=RET.PARAMERR,errmsg="参数错误")
    try:
        comment = Comment.query.get(comment_id)
    except Exception as e:
         current_app.logger.error(e)
         return jsonify(errno=RET.DBERR,errmsg="数据库查询错误")
    if not comment:
        return jsonify(errno=RET.NODATA,errmsg="评论不存在")
    comment_like = CommentLike.query.filter_by(comment_id=comment_id,user_id = user.id).first()

    if action == "add":
        if not comment_like:
            comment_like = CommentLike()
            comment_like.comment_id = comment_id
            comment_like.user_id = user.id
            try:
                db.session.add(comment_like)
                comment.like_count += 1
            except Exception as e:
                current_app.logger.error(e)
                return jsonify(errno=RET.DBERR,errmsg="数据库保存错误")
    else:
        if comment_like:
            try:
                db.session.delete(comment_like)
                comment.like_count -= 1
            except Exception as e:
                current_app.logger.error(e)
                return jsonify(errno=RET.DBERR, errmsg="数据库保存错误")


    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()

        return jsonify(errno=RET.DBERR, errmsg="操作失败")


    return jsonify(errno=RET.OK, errmsg="OK")












